The regnal year, reign period, or regnal title used when traditionally numbering years in an emperor's reign and naming certain Chinese rulers.

plural of era name

Synonym of modern period or modern history (the period following postclassical history, in Europe known as the "Middle Ages", spanning from about 1500 to the present).

(Internet slang) A period marked by failure, lack of success, or inability to function or thrive.

Alternative form of Common Era

(historical) A period of widespread social activism and political reform across the United States that spanned the 1890s to the 1920s.

Synonym of Common Era

(chronology) The secular equivalent of anno Domini and the Christian Era, the internationally recognized method of numbering years on the Gregorian calendar.

(geology, Paleontology) A subdivision of geologic time that divides an eon into smaller timeframes.

Any of several periods of history noted for a particular style of art, architecture, literature or music termed classical